Aislo/B05_Profile/B05_Profile_UI_Structures_Panel.ts

/* =============================================================================
 * B05_Profile_UI_Structures_Panel.ts
 * 구조물 배치 사이드바 섹션 — 구조물군(A~G) → 타입 → 배치형태별 위치 → 옵션 입력.
 *
 * 타입 목록과 옵션 칸은 화면에 박아 두지 않고 서버 레지스트리(`GET /structure-types`)에서
 * 받아 그린다. 구조물 종류가 늘어도 이 파일을 고치지 않게 하려는 것이다.
 *
 * 배관(구조물군 A)은 배수유역도의 관 지점이 정본이라 이 목록에서 다루지 않는다 —
 * 기존 「구조물 배치」 섹션(비정규 측점)이 그대로 담당한다.
 * ========================================================================== */

import {
  defaultOptions,
  structureAnchorM,
  type StructureInstance,
  type StructurePlacement,
  type StructureSide,
  type StructureType,
} from "./B05_Profile_Api_Structures";

/** 구조물군 표시 이름. 리스트 기호(A~G)만으로는 무엇인지 알기 어렵다. */
const GROUP_LABELS: Record<string, string> = {
  A: "A 횡단배수",
  B: "B 종단배수",
  C: "C 사면안정",
  D: "D 계류·사방",
  E: "E 안전·부대·용지",
  F: "F 생태·녹화",
  G: "G 노면공",
  호환: "기타",
};

const SIDE_LABELS: Array<[StructureSide, string]> = [
  ["left", "좌측"],
  ["right", "우측"],
  ["center", "중심"],
  ["cross", "횡단"],
];

/** 구간형 신규 추가 시 기본 구간 길이(m). 사용자가 종점을 바로 고칠 수 있게 짧게 잡는다. */
const DEFAULT_INTERVAL_LENGTH_M = 15;

export interface StructuresSection {
  root: HTMLElement;
  /** 서버에서 받은 타입 목록을 채운다(최초 1회). */
  setTypes: (types: StructureType[]) => void;
  /** 서버 정본으로 목록을 교체한다(진입·복원·저장 후). */
  setStructures: (structures: StructureInstance[]) => void;
  getStructures: () => StructureInstance[];
  /** 종단도·3D에서 고른 구조물을 폼에 올린다. null이면 선택 해제. */
  selectById: (structureId: string | null) => void;
  /** 종단 그래프 우클릭으로 타입을 지정해 추가한다. */
  addAt: (chainageM: number, typeId: string) => void;
  /** 종단 그래프에서 마크를 끌어 옮긴다. 옮겼으면 true. */
  moveById: (structureId: string, toChainageM: number) => boolean;
  removeById: (structureId: string) => boolean;
}

interface StructuresCallbacks {
  /** 목록이 바뀔 때(추가·수정·삭제) 전체 목록을 넘긴다. */
  onChange: (structures: StructureInstance[]) => void;
  /** 목록에서 고르거나 해제할 때. */
  onSelect: (structure: StructureInstance | null) => void;
}

function field(labelText: string, input: HTMLElement): HTMLLabelElement {
  const wrapper = document.createElement("label");
  wrapper.className = "b05-route__field";
  const caption = document.createElement("span");
  caption.textContent = labelText;
  wrapper.append(caption, input);
  return wrapper;
}

function numberInput(step = "0.1", min = "0"): HTMLInputElement {
  const input = document.createElement("input");
  input.type = "number";
  input.step = step;
  input.min = min;
  return input;
}

function select(options: ReadonlyArray<[string, string]>): HTMLSelectElement {
  const element = document.createElement("select");
  element.replaceChildren(...options.map(([value, label]) => new Option(label, value)));
  return element;
}

export function createStructuresSection(callbacks: StructuresCallbacks): StructuresSection {
  const root = document.createElement("section");
  root.className = "b05-route__panel-section ui-collapsible ui-sidebar-section";
  const heading = document.createElement("h3");
  heading.className = "ui-collapsible__title";
  heading.textContent = "구조물 추가";
  const body = document.createElement("div");
  body.className = "b05-route__panel-body";
  root.append(heading, body);

  const groupSelect = select([]);
  const typeSelect = select([]);
  const sideSelect = select(SIDE_LABELS);
  const startField = numberInput();
  startField.placeholder = "시점";
  const endField = numberInput();
  endField.placeholder = "종점";
  const offsetField = numberInput();
  offsetField.value = "0";
  const memoField = document.createElement("input");
  memoField.type = "text";
  memoField.placeholder = "메모(선택)";

  const startWrap = field("위치 (m)", startField);
  const endWrap = field("종점 (m)", endField);
  const positionRow = document.createElement("div");
  positionRow.className = "b05-route__irregular-row";
  positionRow.append(startWrap, endWrap);

  const sideRow = document.createElement("div");
  sideRow.className = "b05-route__irregular-row";
  sideRow.append(field("설치측", sideSelect), field("이격 (m)", offsetField));

  // 옵션 칸은 타입마다 다르므로 선택할 때마다 새로 그린다.
  const optionRow = document.createElement("div");
  optionRow.className = "b05-route__irregular-row";

  const primary = document.createElement("button");
  primary.type = "button";
  primary.className = "b05-route__irregular-btn is-primary";
  const removeButton = document.createElement("button");
  removeButton.type = "button";
  removeButton.className = "b05-route__irregular-btn is-danger";
  removeButton.textContent = "삭제";
  const resetButton = document.createElement("button");
  resetButton.type = "button";
  resetButton.className = "b05-route__irregular-btn";
  resetButton.textContent = "리셋";
  const actions = document.createElement("div");
  actions.className = "b05-route__irregular-actions";
  actions.append(primary, removeButton, resetButton);

  const list = document.createElement("ul");
  list.className = "b05-route__irregular-list";
  const help = document.createElement("p");
  help.className = "b05-route__note";
  help.textContent =
    "구조물군과 종류를 고르고 위치를 입력해 추가합니다. 구간형은 시점~종점을 받고, " +
    "종단도에는 시점 위치에 표시됩니다. 배관은 위 배수유역 연동 항목에서 관리합니다.";

  body.append(
    field("구조물군", groupSelect),
    field("종류", typeSelect),
    positionRow,
    sideRow,
    optionRow,
    actions,
    list,
    help,
  );

  let types: StructureType[] = [];
  let structures: StructureInstance[] = [];
  let editingId: string | null = null;
  let optionInputs: Array<{ key: string; read: () => string | number }> = [];

  function typeMap(): Map<string, StructureType> {
    return new Map(types.map((type) => [type.type_id, type]));
  }

  function currentType(): StructureType | null {
    return typeMap().get(typeSelect.value) ?? null;
  }

  function placementOf(typeId: string): StructurePlacement {
    return typeMap().get(typeId)?.placement ?? "point";
  }

  /** 배치형태에 맞춰 위치 칸을 바꾼다 — 구간형만 종점을 받는다. */
  function syncPlacementFields(): void {
    const placement = currentType()?.placement ?? "point";
    endWrap.hidden = placement !== "interval";
    startWrap.querySelector("span")!.textContent =
      placement === "interval" ? "시점 (m)" : "위치 (m)";
  }

  /** 타입의 옵션 스키마대로 입력 칸을 다시 그린다. */
  function renderOptionFields(values: Record<string, string | number> = {}): void {
    const type = currentType();
    optionInputs = [];
    optionRow.replaceChildren();
    if (!type || !type.options.length) {
      optionRow.hidden = true;
      return;
    }
    optionRow.hidden = false;
    type.options.forEach((option) => {
      const preset = values[option.key] ?? option.default ?? "";
      let input: HTMLInputElement | HTMLSelectElement;
      if (option.input === "select") {
        input = select(option.choices.map((choice) => [choice, choice] as [string, string]));
        input.value = String(preset || option.choices[0] || "");
      } else if (option.input === "number") {
        input = numberInput("0.1", "0");
        input.value = String(preset ?? "");
      } else {
        input = document.createElement("input");
        (input as HTMLInputElement).type = "text";
        input.value = String(preset ?? "");
      }
      const label = option.unit ? `${option.label} (${option.unit})` : option.label;
      optionRow.append(field(label, input));
      optionInputs.push({
        key: option.key,
        read: () => (option.input === "number" ? Number(input.value) || 0 : input.value),
      });
    });
  }

  /** 고른 구조물군의 타입만 종류 목록에 채운다. */
  function syncTypeOptions(keepTypeId?: string): void {
    const group = groupSelect.value;
    const candidates = types.filter((type) => type.group === group && !type.managed_by);
    typeSelect.replaceChildren(...candidates.map((type) => new Option(type.name, type.type_id)));
    if (keepTypeId && candidates.some((type) => type.type_id === keepTypeId)) {
      typeSelect.value = keepTypeId;
    }
    syncPlacementFields();
    renderOptionFields();
  }

  function syncButtons(): void {
    primary.textContent = editingId ? "수정" : "추가";
    removeButton.disabled = editingId === null;
  }

  function labelOf(structure: StructureInstance): string {
    const type = typeMap().get(structure.type_id);
    const name = type?.name ?? structure.type_id;
    const position =
      structure.placement === "interval"
        ? `${(structure.start_m ?? 0).toFixed(1)}~${(structure.end_m ?? 0).toFixed(1)}m`
        : `${(structure.chainage_m ?? 0).toFixed(1)}m`;
    return `${position} · ${name}`;
  }

  function renderList(): void {
    list.replaceChildren();
    if (!structures.length) {
      const empty = document.createElement("li");
      empty.className = "b05-route__irregular-empty";
      empty.textContent = "추가된 구조물이 없습니다.";
      list.append(empty);
      return;
    }
    [...structures]
      .sort((left, right) => structureAnchorM(left) - structureAnchorM(right))
      .forEach((structure) => {
        const item = document.createElement("li");
        item.className = "b05-route__irregular-item";
        item.classList.toggle("is-selected", structure.structure_id === editingId);
        const name = document.createElement("strong");
        name.textContent = labelOf(structure);
        const info = document.createElement("span");
        const sideLabel = SIDE_LABELS.find(([value]) => value === structure.side)?.[1] ?? "";
        info.textContent = [sideLabel, structure.memo].filter(Boolean).join(" · ");
        item.append(name, info);
        item.addEventListener("click", () =>
          loadForm(structure.structure_id === editingId ? null : structure),
        );
        list.append(item);
        if (structure.structure_id === editingId) item.scrollIntoView({ block: "nearest" });
      });
  }

  function loadForm(target: StructureInstance | null): void {
    editingId = target?.structure_id ?? null;
    if (target) {
      const type = typeMap().get(target.type_id);
      if (type) {
        groupSelect.value = type.group;
        syncTypeOptions(target.type_id);
      }
      startField.value = String(
        target.placement === "interval" ? (target.start_m ?? 0) : (target.chainage_m ?? 0),
      );
      endField.value = String(target.end_m ?? "");
      sideSelect.value = target.side;
      offsetField.value = String(target.offset_m ?? 0);
      memoField.value = target.memo ?? "";
      renderOptionFields(target.options);
    } else {
      startField.value = "";
      endField.value = "";
      offsetField.value = "0";
      memoField.value = "";
      renderOptionFields();
    }
    syncPlacementFields();
    syncButtons();
    renderList();
    callbacks.onSelect(target);
  }

  function readOptions(): Record<string, string | number> {
    const values: Record<string, string | number> = {};
    optionInputs.forEach((input) => {
      values[input.key] = input.read();
    });
    return values;
  }

  function emit(): void {
    renderList();
    callbacks.onChange([...structures]);
  }

  function commit(): void {
    const type = currentType();
    if (!type) return;
    const start = Number.parseFloat(startField.value);
    if (!Number.isFinite(start) || start < 0) {
      startField.focus();
      return;
    }
    const placement = type.placement;
    let end: number | null = null;
    if (placement === "interval") {
      end = Number.parseFloat(endField.value);
      if (!Number.isFinite(end) || end <= start) {
        endField.focus();
        return;
      }
    }

    const base = {
      type_id: type.type_id,
      placement,
      chainage_m: placement === "interval" ? null : start,
      start_m: placement === "interval" ? start : null,
      end_m: end,
      side: sideSelect.value as StructureSide,
      offset_m: Number(offsetField.value) || 0,
      options: readOptions(),
      memo: memoField.value.trim(),
      placement_source: "manual" as const,
      status: "draft" as const,
      revision: 0,
      geometry: null,
    };

    if (editingId) {
      const index = structures.findIndex((entry) => entry.structure_id === editingId);
      if (index >= 0) structures[index] = { ...structures[index], ...base };
    } else {
      structures.push({ ...base, structure_id: null });
    }
    loadForm(null);
    emit();
  }

  groupSelect.addEventListener("change", () => {
    syncTypeOptions();
    // 종류가 바뀌면 기존 항목 수정이 아니라 새 항목 추가로 넘어간다(옵션 스키마가 달라진다).
    if (editingId) {
      editingId = null;
      syncButtons();
      renderList();
      callbacks.onSelect(null);
    }
  });
  typeSelect.addEventListener("change", () => {
    syncPlacementFields();
    renderOptionFields();
    if (editingId) {
      editingId = null;
      syncButtons();
      renderList();
      callbacks.onSelect(null);
    }
  });
  primary.addEventListener("click", commit);
  removeButton.addEventListener("click", () => {
    if (!editingId) return;
    const index = structures.findIndex((entry) => entry.structure_id === editingId);
    if (index >= 0) structures.splice(index, 1);
    loadForm(null);
    emit();
  });
  resetButton.addEventListener("click", () => loadForm(null));

  body.insertBefore(field("메모", memoField), actions);
  syncButtons();
  renderList();

  return {
    root,
    setTypes(next) {
      types = next;
      const groups = [...new Set(next.filter((type) => !type.managed_by).map((t) => t.group))];
      groupSelect.replaceChildren(
        ...groups.map((group) => new Option(GROUP_LABELS[group] ?? group, group)),
      );
      // 배관(A군)은 배수유역 정본이 관리하므로 기본 선택은 그다음 군으로 둔다.
      groupSelect.value = groups.includes("B") ? "B" : (groups[0] ?? "");
      syncTypeOptions();
    },
    setStructures(next) {
      // 서버 정본 주입 — onChange를 울리지 않는다. 울리면 Page가 다시 저장을 걸어
      // 저장→재조회→주입→저장의 무한 고리가 된다(변경 알림은 사용자 조작에서만).
      structures = next.map((entry) => ({ ...entry }));
      loadForm(null);
      renderList();
    },
    getStructures: () => [...structures],
    selectById(structureId) {
      if (structureId === null) {
        loadForm(null);
        return;
      }
      loadForm(structures.find((entry) => entry.structure_id === structureId) ?? null);
    },
    addAt(chainageM, typeId) {
      const type = typeMap().get(typeId);
      if (!type || type.managed_by) return;
      const placement = placementOf(typeId);
      structures.push({
        structure_id: null,
        type_id: typeId,
        placement,
        chainage_m: placement === "interval" ? null : chainageM,
        start_m: placement === "interval" ? chainageM : null,
        end_m: placement === "interval" ? chainageM + DEFAULT_INTERVAL_LENGTH_M : null,
        side: "center",
        offset_m: 0,
        options: defaultOptions(type),
        memo: "",
        placement_source: "manual",
        status: "draft",
        revision: 0,
        geometry: null,
      });
      emit();
    },
    moveById(structureId, toChainageM) {
      const index = structures.findIndex((entry) => entry.structure_id === structureId);
      if (index < 0) return false;
      const target = structures[index];
      if (target.placement === "interval") {
        // 구간은 길이를 유지한 채 통째로 옮긴다 — 기점만 끌면 종점이 따라온다.
        const length = (target.end_m ?? 0) - (target.start_m ?? 0);
        structures[index] = { ...target, start_m: toChainageM, end_m: toChainageM + length };
      } else {
        structures[index] = { ...target, chainage_m: toChainageM };
      }
      emit();
      return true;
    },
    removeById(structureId) {
      const index = structures.findIndex((entry) => entry.structure_id === structureId);
      if (index < 0) return false;
      structures.splice(index, 1);
      if (editingId === structureId) loadForm(null);
      emit();
      return true;
    },
  };
}